diff --git a/task.go b/task.go
index d4fd215..fdbc00d 100644
--- a/task.go
+++ b/task.go
@@ -66,7 +66,12 @@ func Build(buildkitd *Buildkitd, outputsDir string, req Request) (Response, erro
 	var imagePaths []string
 
 	for _, t := range cfg.AdditionalTargets {
-		targetArgs := append(buildctlArgs, "--opt", "target="+t)
+		// prevent re-use of the buildctlArgs slice as it is appended to later on,
+		// and that would clobber args for all targets if the slice was re-used
+		targetArgs := make([]string, len(buildctlArgs))
+		copy(targetArgs, buildctlArgs)
+
+		targetArgs = append(targetArgs, "--opt", "target="+t)
 
 		targetDir := filepath.Join(outputsDir, t)
 
diff --git a/task_test.go b/task_test.go
index 4559025..1398312 100644
--- a/task_test.go
+++ b/task_test.go
@@ -319,6 +319,32 @@ func (s *TaskSuite) TestMultiTarget() {
 	s.Equal("additional-target", additionalCfg.Config.Labels["target"])
 }
 
+func (s *TaskSuite) TestMultiTargetExplicitTarget() {
+	s.req.Config.ContextDir = "testdata/multi-target"
+	s.req.Config.AdditionalTargets = []string{"additional-target"}
+	s.req.Config.Target = "final-target"
+
+	err := os.Mkdir(s.outputPath("additional-target"), 0755)
+	s.NoError(err)
+
+	_, err = s.build()
+	s.NoError(err)
+
+	finalImage, err := tarball.ImageFromPath(s.imagePath("image.tar"), nil)
+	s.NoError(err)
+
+	finalCfg, err := finalImage.ConfigFile()
+	s.NoError(err)
+	s.Equal("final-target", finalCfg.Config.Labels["target"])
+
+	additionalImage, err := tarball.ImageFromPath(s.outputPath("additional-target", "image.tar"), nil)
+	s.NoError(err)
+
+	additionalCfg, err := additionalImage.ConfigFile()
+	s.NoError(err)
+	s.Equal("additional-target", additionalCfg.Config.Labels["target"])
+}
+
 func (s *TaskSuite) TestMultiTargetDigest() {
 	s.req.Config.ContextDir = "testdata/multi-target"
 	s.req.Config.AdditionalTargets = []string{"additional-target"}
diff --git a/testdata/multi-target/Dockerfile b/testdata/multi-target/Dockerfile
index a05996b..47744ae 100644
--- a/testdata/multi-target/Dockerfile
+++ b/testdata/multi-target/Dockerfile
@@ -5,7 +5,7 @@ ADD Dockerfile /Dockerfile.banana
 ENV PATH=/darkness
 ENV BA=nana
 
-FROM scratch
+FROM scratch AS final-target
 LABEL target=final-target
 USER orange
 ADD Dockerfile /Dockerfile.orange